An evaluation of the 3-methyl-2-benzothiazolinone hydrazone method for the determination of phenols in water and waste waters

Abstract

Friestad's method for the determination of phenol with 3-methyl-2- benzothiazolinone hydrazone (MBTH) has been evaluated. The Friestad manual and automated MBTH methods were modified to lower the detection limit from 1 mg l -1 to 1 μg l -1. The values for phenol obtained by this method on river water and industrial waste samples were equal to or greater than those obtained by the 4-aminophenazone method.